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Androgen Receptor (AR) Signalling Pathway









            Androgens (T) are produced at 3 sites                                                                Testes        Adrenal glands



             • Testes                                                                                                                        Reducing T to bind and activate the AR
                                                                                                                                                decreases tumour cell proliferation
             • Adrenal glands



             • Prostate tumour cells                                                                                        Testosterone/DHEA

                 (occasionally)                                                                                                  5-reductase


                                                                                                               HSP
           In the eugonadal state, 95% of androgens are

                             produced by the testis                                                     HSP                 DHT                                       DHT
                                                                                                                                           Nuclear                     AR      Nucleus

                                                                                                       HSP        HSP      AR           translocation                  AR
                                                                                                   dissociation                                                       DHT
                                                                                                                  HSP      AR



                                                                                                                            DHT



                                                                                                                                        Lamb AD, et al. Trends Urol Mens Health 2013;4:26-30
                                                                                         National Cancer Institute. https://www.cancer.gov/types/prostate/prostate-hormone- therapy-fact-sheet.
                  AR Androgen receptor DHT Dihydrotestosterone                                                                                                Accessed February 1, 2021
                  HSP Heat shock protein  T Testosterone                                                  Figure adapted from ©Bandyopadhyay M, Muthuirulan P. J Drug Des Devel 2017;1:1-10
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